package mi.hdm.filesystem; import mi.hdm.TastyPages; public class FileManager { private static final FileManager fileManager = new FileManager(); public static FileManager getInstance() { return fileManager; } public void serializeToFile(TastyPages app) { } public TastyPages deserializeFromFile(String filepath) { return null; } private void recipeToJSON() { } private void ingredientToCSV() { } }